<template>
  <div>
    <!-- 顶部滑动条 -->
    <div id="slider" class="mui-slider">
      <div
        id="sliderSegmentedControl"
        class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted"
      >
        <div class="mui-scroll">
          <a
            :class="['mui-control-item' , item.id===0? 'mui-active':' ']"
            v-for="item in categorys"
            :key="item.id"
            @click="getPhotoListById(item.id)"
          >{{item.title}}</a>
        </div>
      </div>
    </div>

    <!-- 图片列表区 -->
    <div>
      <ul class="photo-list">
        <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/'+item.id" tag="li">
          <img v-lazy="item.img_url" />
          <div class="info">
              <h3 class="info-title">{{item.title}}</h3>
              <div class="info-body">{{item.zhaiyao}}</div>
          </div>
        </router-link>
      </ul>
    </div>
  </div>
</template>

<script>
import mui from "../../lib/mui/js/mui.min.js";
import { Toast } from "mint-ui";

export default {
  data() {
    return {
      categorys: [], //接收图片分类
      list: [] //接收图片列表
    };
  },
  created() {
    this.getAllCategory();
    this.getPhotoListById(0); //默认进入页面就显示全部
  },
  mounted() {
    //mounted 不会承诺所有的子组件也都一起被挂载。如果你希望等到整个视图都渲染完毕，可以用 vm.$nextTick 替换掉 mounted
    //初始化滑动条
    mui(".mui-scroll-wrapper").scroll({
      deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
    });
  },
  methods: {
    getAllCategory() {
      this.$http.get("api/getimgcategory").then(result => {
        if (result.body.status === 0) {
          result.body.message.unshift({ title: "全部", id: 0 });
          this.categorys = result.body.message;
        }
      });
    },
    getPhotoListById(cateid) {
      this.$http.get("api/getimages/" + cateid).then(result => {
        if (result.body.status === 0) {
          this.list = result.body.message;
        } else {
          Toast("图片加载失败");
        }
      });
    }
  }
};
</script>

<style lang="scss" scoped>
* {
  touch-action: pan-y;
}
.photo-list {
    list-style: none;
    margin: 0;
    padding: 5px;
    padding-bottom: 0;
    li {
    background-color: #ccc;
    text-align: center;
    margin-bottom: 10px;
    box-shadow: 0 0 9px #999;
    position: relative;
    img{
        width: 100%;
        vertical-align: middle;
    }
    img[lazy="loading"] {
      width: 40px;
      height: 300px;
      margin: auto;
    }
    .info{
        color: white;
        text-align: left;
        position:absolute;
        bottom: 0;
        background-color:rgba(0,0,0,0.4);
        max-height: 84px;
        .info-title{
            font-size: 14px;
        }
        .info-body{
            font-size: 12px;
        }
    }
  }
}
</style>